The secret behind the Positorq Tension/Dyno brakes is the Forced Lube Cooling Unit. It consists of a fluid reservoir with fluid flow pumps, actuation pump (if hydraulic actuation), filters, and cooling heat exchangers. Oil-To-Air or Oil-To-Water exchangers can be furnished.
By cooling and filtering the fluid separate from the brake high horsepower thermal loads can be dissipated without over sizing the brake.
FLCU are typically designed for the application to operate one brake or multiple brakes. Various level of controls is available.
Positorq brake applications typically include two major components – the brake connected to the load and a Forced Lube Cooling Unit. The brake is a multiple disc hydroviscous brake featuring Oil Shear Technology developed and refined by Force Control Industries, Inc. starting in 1969. The multiple disc brake stack is actuated by applying a clamping pressure to the stack through a piston. The actuation medium can be pneumatic or hydraulic, hydraulic being more controllable with quicker response. Changing the actuation pressure changes the torque transmitted proportionally.
Because this is a compact design with low inertia rotating components there is little surface area to dissipate thermal energy from the continuous slip load. For that reason we utilize a separate free standing forced lube cooling unit to pump transmission fluid through the brake returning it to be cooled and filtered and returned to the brake.
There are many variations of forced lube cooling units however the basic requirements include the following: